Patent GB-219687-A (GB)
Title: Improvements in or relating to apparatus for perforating sheet material
Filed: 1924-07-22
Abstract: 219,687. British Tabulating Machine Co., Ltd., (Assignees of Braitmayer, O. E.). July 23, 1923, [Convention date]. Selective perforating machines. - Relates to machines for perforating statistical cards and comprises apparatus, controlled by a perforated master card, for making a duplicate of some or all of the data on the master card, for transposing data from one field of the master card to other fields of the blank, for automatically punching repetition data in selected fields of the blank, and for suppressing certain data derived from the master card and substituting other data selectivtaly determined by a set-up in the machine. The master cards are taken from a supply stack 15 by a picker and are delivered to upper feed rolls 12 thence by a card clip mechanism to lower discharge rolls 13 which pass the cards to a stacker 14 delivering to a discharge stack 16. Identical mechanism operated concurrently delivers blian.ks from a supply pocket to a discharge stack, ordinary gearing from a motor driving the picker, the feed rolls and the stacker. The card clip is actuated by a cam 19, Fig. 3, giving an intermittent forward and a quick-return motion to a pivoted follower 20 connected to a rack 21 driving a pinion 22. A shaft 22<a> carrying the latter also bears pinions 23 meshing with racks 24 supporting the clip mechanism. The clip mechanism, Fig. 7, comprises anvils 25 with cooperating spring-actuated clips 26 carrying locking arms 27 engaging locking dogs 28. The clips are opened by a fixed cam 29 engaging a pin 30 on the arm 27 and are released by a fixed pin 31. To ensure the operation of the clips fingers 33 are projected between the cards by linkage 35 actuated from cams 36, 37 on a shaft 38. For reading the master cards a transverse bar 40, Fig. 3, with brushes 41 co-operate through perforations in the card with contact blocks 42 to close circuits containing a plug-board and selector solenoids for the punches. The punches are actuated by a common bar 48, Fig. 7, reciprocated by a cam 49 engaging a pin 50 during the period when the card is at rest. On energizing a solenoid 45 a wire 55 is pulled swinging a pawl 56 and releasing a T-lever 57 allowing a spring 58 to rock the latter and project a corresponding abutment member 53 between the bar 48 and the punch 46. The punches are restored by fingers 60 actuated by a bail 61 connected to the bar 48 and the T-levers 57 are relatched by a bell-crank 63 carrying a cross-shaft vibrated at the proper time in the cycle by a pin 66 on a dial 67 mounted on a shaft 51. In the circuit diagram, Fig. 13, the common bar 40 is connected to a main 70 and the brushes 41 with contacts 42 bv wires 72 to plug-points 73 on the plug-board 43. The selector magnets 45 are connected to points 74 on the board and to the return main 71 through cam contact-devices 76, 76<a> for making circuit through the solenoids when the cards are at rest. By means of the plug points 73, 74 data derived from any particular field on the master card may be impressed either in the same or in a different field of the blank. The contacts 76. 76<a> are mounted on the shaft 10 which carries also a sleeve bearing groups of slotted wheels 80, 81 and an indicator wheel which latter through a hand set clutch may be held st,ationary, left free or coupled to the shaft 10. Cam clips may be inserted in the slots of the wheels 80 for operating contacts 94, and similar clips 93 on the. wheel 81 for closing contacts 95 when the holes in the master cards are under the brushes. Each of the contacts 94 is connected to plug points 97 on the board so that by suitably arranging the clips 93 and plugging the points 97, 74 repetition data may be punched on the blanks. The single wheel 81 and the contacts 95 control the last column of the cards and are used either to suppress the punching of the blank or to substitute a punching corresponding to the set-up of the machine. The contacts 95 are in circuit with the block 42a and plug points 73<a> and remain closed until they are opened by clips 93. This renders the end selector inoperative, thus suppressing the perforating of the blank irrespective of a perforation in the master card. If it is desired to make a perforation in accordance with the set-up of the machine one clip 93 on wheel 80 is utilized and the corresponding plug point 97 is plugged to a supplementary socket 102.